Mechanism for cutting double pile fabrics



(No Model.) 3 Sheets-Sheet l.

C. R. GARRATT. MECHANISM FOR CUTTING DOUBLE PILE FABRICS.

No. 334,947. Patented Jan. 26. 1886.

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(No Model.) 3 Sheets-Sheet 2.

0. R. GARRATT. MECHANISM FOR CUTTING DOUBLE PILE FABRICS.

No. 334,947. Patented $2111.26, 1886.

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(No Model.) 3 Sheets-Sheet 3.

0. R. GARRATT.

MECHANISM FOR CUTTING DOUBLE PILE FABRICS. No. 334,947. Patented Jan. 26, 1886.

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CHARLES R. GARRATT, OF BRIDGEPOBT, CONNECTICUT.

MECHANISM FOR CUTTING DOUBLE PILE'. FABRICS.

SPECIFICATION forming part of Letters Patent No. 334,947, dated January 26, 1886.

Application filed June 19, 1884. Serial No. 135,385. (No model.)

To (ZZZ whom it may concern.-

Be it known that 1, CHARLES It. G-ARRATT, a citizen of the United States. residing at Bridgeport, in the county of. Fairfield and State of Connecticut, have invented certain new and useful Improvements in Mechanism for Cutting Double Pile Fabrics; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to the manufacture of that class of pile fabrics which are woven double with a long pile betweenthe two backs, and then separated by cutting the pile, and has for its object to produce cutting mechanism to be operated by the loom, which shall be simple and inexpensive in construction, and

which will obviate the principal objections to the cutting mechanisms nowin use, which are a constant liability to get out of repair, and the necessity for frequent sharpening of the knife.

WVith these ends in view I have devised the simple and novel construction, which I will now describe, referring by letters to the accompanying drawings, forming part of this specification, in which Figure l is a plan view of a part of a loom having my invention applied thereto; Fig. 2, a front elevation thereof, with the bracket. which supports the operating-shaft, as well as said shaft and its driving-pulley and bevelgear, removed; Fig. 3, adetail cross section of the knife, the guide therefor, and the fabrics before and after their separation by the cutting of the pile; Fig. 4, a view of a modified form of operatingcam; Fig. 5, a view of a modification, showing the knife as operated from the lathe instead of the main shaft; and Fig. 6 is a plan view of the knife, showing the manner in which the cords are attached. Fig. 7 is a sectional side elevation of aloom (differing somewhat from the form of loom shown in in Figs. 1 and 2) with my invention applied thereto.

Similar letters indicate like parts in all the figures.

A represents frame-work of a loom, which may be of any form, as my invention is equally applicable to all styles of looms.

B is the main shaft,journaled in the framework, and provided with a driving-pulley, B, or other means for imparting rotation thereto.

C is a cross-piece located at the front of the loom,constructed in any manneigandl provided with a groove, C, extending across the loom in which the knife D reciprocates. The main portion of the cuttingedge of the knife D is straight, but the ends or corners thereof are rounded or chamfered off, so that said knife will cut equally well when moving in either direction, while the straight cutting-edge be tween the rounded corners is adapted to sever the pile in a smooth and effectual manner by very short reciprocating movements of the knife. At the opposite ends of the knifeI attach cords, wires or chains E, which pass over pulleys F. One of the cords or wires is attached to a spring, G, which is secured to the floor or any fixed portion of the building. The other cord or wire is attached to a lever, H, which is'pivoted in a bracket, H, secured ,to the framework. This lever may be caused to vibrate by means of a cam or crank.

In Fig. 1 I have shown a bevel-gear, I, at the end of the main shaft opposite to the driving-pulley, which meshes with agear, K, upon a vertical shaft, K. This shaft is supported in any suitable manner, as at K K, and carries a gear, 1C, which meshes with a gear, L, on a shaft, L, to which it imparts motion. The shafts B and L are shown in Fig. 7 as being connected by a belt, b, running over suitable pulleys. B L, 011 said shafts. The shaft L is supported in any suitable manner, as at L L and carries a cam, I which acts upon lever H to force it outward, and consequently to force the knife to the extreme right of the groove against the power of spring G. The action of the spring as it contracts is to draw the knife to the extremeleft of the groove, and at the same time to draw the lever inward. If preferred, a weight may be substituted for the spring. This cam I make with either two or four faces, as shown in. Figs. 2 and 4.

In the drawings all the gears and pulleys are sh own as of the same size; consequently at each pick of the loom one revolution is imparted to shaft L and to the cam carried thereby. As each movement of lever H in eitherdirection causes the knife to traverse the groove,

it follows that the two-sided cam will produce .twothrows of the knife and the four-sided cam will produce four throws of the knife.

actual amount of cutting required at each throw of the knife to the minimum, and leave a perfectly even and smooth surface to thepile of both fabrics.

As shown in Figs. 3 and 7,the fabrics, after being separated, are drawn over the edges of the cross-piece, then directly backward, where they may be wound or folded as rapidly as they are cut.

I have shown in Fig. 7 roughen-surfaced rollers X, by which the fabrics may be held taut and drawn backward from the knife, so that the centers of the uncut pile will be evenly presented thereto to be cut; but this mechanism for moving the fabrics toward the knife forms no part of my invention, and it will be understood that any suitable mechanism for this purpose may be employed.

The take-up rollers X may be operated by any suitable mechanismas, for example, by such as is shown by United States Patent No. 282,652, for this purpose.

I do not desire to limit myself. to the exact construction shown, as it is evident that it may be varied within reasonable limits without departing from the spirit of my invention.

It is of course not necessary that motion should be imparted to the cutting device from the main shaft, nor is it necessary that the system of gears herein shown should be used, as other simple and well-known means of transmitting motion may be used, if preferred.

In Fig. 5 I have shown one of the cords as attached directly to the lathe O, the latter being operated in any suitable or well known manner, as by means of links 0, attached to cranks 0, on a counter-shaft, B, connected by gears b (indicated by dotted lines in Fig. 7) with the main shaft 13. When operated in this manner, the knife D will be reciprocated in its guiding-groove at each throw of the lathe.

I have illustrated a simple means of attaching the cords to the knife, which I preferably employ. At the back of the knife at each end, are short grooves D, which run into recesses D. A knot at the end of the cordslies in these recesses. The cords lie in the grooves. and are secured to the knife by pins or screws D, which pass through the knots and into the back of the knife.

Having thus described my invention, I claim- 1. The combination, with the framework of a loom having a cross-piece formed with a guiding-groove, of a knife adapted to slide flatwise in said groove, and having a cuttingedge the main part of which is straight, but which is rounded or chamfered off at both ends, and mechanism for reciprocating saidknife in said guidinggroove, substantially as set forth.

2. The combination, with the framework of a loom having a cross-piece formed with a guiding-groove, of a knife adapted to slide flatwise in said groove, and having a straight cutting-edge which is rounded off at both ends, a lever, a spring, wires or cords for connecting said lever and spring with said knife, and mechanism for vibrating said lever, substantially as set forth.

3. The combination, with the frame-work of a loom having a cross-piece formed with a guiding-groove, of a knife adapted to slide flatwise in said groove, and having a straight cutting-edge which is rounded off at both ends, a lever, a spring, a cam, wires or cords for connecting said lever and spring with said knife, an operating-shaft on which said cam is mounted, a driving-shaft, and connections between the latter and said operating-shaft, substantially as set forth.

In testimony whereof I affiX my signature in presence of two witnesses.

CHARLES R. GARRATT.

Witnesses:

A. M. WOOSTER, A. B. FAIRCHILD. 

